【正文】 ological in seawater, bar screen of 50mm and rotating mesh strainer of 4 4mm are set in the nullah. The water pumping station needs to design with 800000 m3/d.建議采用自流明渠引水的取水方式，為避免海水中雜物及生物的影響，在明渠內設置的50mm間隙粗格柵，44mm旋轉篩網濾網。該工藝具有以下優(yōu)點：可以共用海水取水口，能夠充分利用電廠低品位蒸汽，淡化產品水可以按一定比例混合滿足不同需求需求，降低海水淡化成本，減少濃水排放量等。 can be fully used low grade steam from the electric plant。經過近幾年的發(fā)展，反滲透海水淡化工程技術越來越成熟，成套設備制造能力越來越強，應用規(guī)模越來越大，海水反滲透海水淡化技術已逐漸成為海水淡化的主流技術之一。The SWRO technique has many advantages, such as low project investment, short construction period, small scale of plant area, simply operation maintains, low energy, low cost of water yield. After use the measure of energy recycle device and improving the water recycle rate. the energy consumption is great reduced in one unit of water yield, the energy consumption of the desalination seawater is decreased from ~ kwh/m3 per ton now to the ～ kwh/m3 per ton. As the development in these years, SWRO technique is bee much more maturely used, the production capacity of plete plant bee much more powerful, the scale of project is much bigger. Therefore, the SWRO technique is bee one of the main techniques in the field of seawater desalination.海水反滲透淡化技術（SWRO）具有工程投資低、建造周期短、占地面積小、運行維護簡便、能耗低、制水成本低等優(yōu)勢。又因鋁合金、環(huán)氧樹脂涂層、塑料的使用在該溫度下能耐氧的腐蝕，因此低溫多效蒸餾裝置對進入裝置的海水只需加入微量阻垢劑，而不需像多級閃蒸裝置那樣加酸脫除CO2及O2，因而降低了投資和操作成本。另外，由于海水和濃鹽水的腐蝕和結垢速度與其蒸發(fā)溫度密切相關，在海水淡化領域也把降低海水的蒸發(fā)溫度作為解決問題的突破口，這就是近十幾年來興起的低溫淡化（MED)技術。There are two problems in the process of thermo method of seawater desalination, one is the decay of the equipment, and the other is scaling on the heattransfer pipe. To solve these two problems, widely used method is to use the corrosionresistant alloy, and added the antisludging agent to the intake seawater. In addition, due to the corrosion and scaling velocity of the seawater and brine is related to the evaporation temperature, so in the field of seawater desalination to decrease the evaporation temperature of the seawater is a most important problem. This is why MED technique is rising in past dozens of years. A MED technique is generally operated in 70 centi degree, in this temperature, when enrichment factor of seawater is ~, denuded zone of the calcium sulphate and carbonate is still removed from operating point, so the scaling probability is minimum. also because of the use of aluminium alloy, epoxy coating, plastic, which is corrosionresistant in this temperature, so MED equipment can be added only minimum antisludging agent to the seawater, not like MSF, which should be added acid to remove the CO2 and O2. So it can reduce the cost of investment and maintains. Therefore, in past few years, MED technique develops fast, and until 2001, MED separate unit can reach a water yield of 68000m3/d. Also, the total volume of process water is exceeding to the MSF technique, and there are many operation outstanding achievements in the worldwide, and the technique has maturely used in the world.熱法海水淡化工藝面臨的兩大問題是設備的腐蝕和海水在傳熱管上的結垢。膜法主要指海水反滲透（SWRO）技術，它利用半透膜，在壓力下允許水透過而使鹽分和雜質截留的技術。2. 如果數據無誤，建議本工程最好更換取水點或廠址。因此，我方建議：1. 請核實取水點位置、檢測方法、數據記錄等。Proposal of the Seawater desalination 埃及海水淡化工程方案設計1. Project Name工程名稱NEW TECHNOLOGY COGENERATION POWER DESALTION PLANT(CPDP)中東歐電力和水項目公司新技術電力和海水淡化水共生廠2. Project Location 工程地點3. Available Site Area：可用占地面積（250mx500m）for first phase, 25ha for the second phase.4. Project contents and scale 工程內容和規(guī)模 Product water for the first phase（2011） is 360000m3/d and 600000m3/d （2015） for the second phase. 36萬m3/d海水淡化（2011）；60萬m3/d（2015） The scale for bottled water is 3000m3/d 3000m3/d瓶裝飲用水 crystallized salt product 配套結晶鹽項目According to the client requirement, this part is included in another project, so this cost is not in the offer of this project.根據業(yè)主要求，此部分另外立項考慮，投資不在本次報價范圍內5. The raw seawater quality 進水水質情況 Water Quality at the Project Location Physicochemical Analysis of Water Samples at the Project Location (Samples Delivery Date: 29 June 2008) 項目地點處水質情況如下（采用點時間為2008年6月29日）Parameters參數UnitConcentrationSite 1Site 2Site 3Site 4Site 5pH Water Temperature水溫 oC23252426Electrical Conductivity 電導率μmho/cm6115059800620005920060500Transparency透明度 cm9090909090Total Dissolved Solids mg/I3950339557387953888939084Suspended Solids mg/I10Total Solids mg/I38899Total Alkalinity (as CaCO3) mg/I120122124128116Chloride(CI) mg/I2500025000250002500024000Sulfate (SO4 2) mg/I421412439432438Nitrate (NO3N) mg/ISodium (Na+) mg/I1150210842109121098710223Potassium (K+) mg/I753731692684613Manganese μg/lNilCalcium (Ca2+) mg/I561641561561601Magnesium (Mg2+) mg/I17031654160516541581Notes: (1) 100 m up stream. 水質采用點上游100米處，(2) 200 m up stream. 水質采用點上游200米處(3) fronting the power plant site. 水質采用點廠址前，(4) 100 m down stream. 水質采用點下游100米處，(5) 200 m down stream. 水質采用點下游100米處 Surface Water Quality at 300, 500 and 700 m in Three Profiles Extending Seaward form the Project Site (Hydraulics Research Institute, EDF Suez Gulf Power ., 2000)項目地點向海延伸300m，500m，700m處的表面水質情況：ParameterRangeAverageTemperature, oC1718 Salinity, % 鹽分 DO, mg/l DOM, mgO2/I pH TSM, mg/l Chl – a, mg/lNH4, μmole NO2, μmole NO3, μmole TN, μmole PO4, μmole TP, μmole SiO4, μmole Water Quality at the Pro